A Comprehensive Guide About What Is A Stator? Its Different Parts And Working


Last Updated on February 16, 2023 by


In the modern industrialized world, the use of motors and generator are widespread. The motor plays a significant role in our everyday lives. If you are in the house, the fan rotating and giving you a breeze is an example of a motor. After this, if you want to go to your workplace, you use a car or motorcycle. In these cars, the stator is used in the “Alternators” to supply power for properly functioning the car’s electrical system. In industries, a lot of motors and generators are currently working.

All these motors and generators are made of many different types of parts. Some parts are known as the backbone of these motors and generators. Stator is the most crucial part of motors and generators. After reading this article, you will learn about what is a stator?

What is a stator?

The motor and generator stator is the essential part of these machines. As the name describes, the stator is a stationary part of the motor and generator. This part did not move or rotate. The stator generates the electromagnetic field in motors that helps the motor create rotation. It is initially the stator that converts electrical energy into magnetic energy. Electricity is converted to mechanical energy by this magnetic energy.

The stator was not used to convert electrical energy to magnetic energy. Electrical energy is converted into mechanical energy using the rotor’s mechanical energy. For example, the stator does not convert electrical power into mechanical energy in the ceiling fan. It is located at the center of the fan, and the rotor has the winding, which converts electrical energy into magnetic energy.

In the case of a generator, the stator’s working can either convert the mechanical energy into electrical energy or the stator is part of just a magnetic field generation mechanism.

A stator is a critical component of an electric motor, which serves as the stationary part of the motor that surrounds the rotor. It is an essential part of the motor that converts electrical energy into mechanical energy to power various machines and devices. The stator consists of a series of stacked laminations made of ferromagnetic materials such as iron or steel. These laminations are arranged in a circular pattern, forming a hollow cylinder surrounding the rotor.

The stator is designed with coils of wire wound around the laminations, which create a magnetic field when electricity flows through them. As the rotor rotates, the stator’s magnetic field interacts with the rotor’s magnetic field, causing it to turn and power the machine. The stator plays a crucial role in an electric motor’s overall performance and efficiency. It is essential to ensure that it is maintained and serviced properly to prevent motor failure and ensure optimal performance.

Is the magnet the stator?

The static element of electromagnetic circuits is the stator. Depending on the arrangement, the stator may function as armatures that work with the rotor’s rotating armature windings or as field magnets that engage the with the rotor to generate motion.

Part of a stator

The stator has many parts. In these parts, the most important thing is the stator winding and the stainless-steel cores. These two things are packed in an enclosure called the frame of the stator. This frame can be of plastic or can be metal.

Now you will learn in detail about each part of the stator in some points.

Stator windings

The stator winding is the essential thing of a motor. These windings are made from the following two materials:

  • Copper
  • Copper-coated enameled wires

Every slot of the stator cores is equally wound with stator windings. These windings winds in the slots with the counting of their turns. Each turn of the winding has dominant significance.

These windings have only two terminals connected to the main supply in a single-phase motor. And if the motor is designed for three phases, it has six connections to get supply from the power source.

The winding formation describes how many poles can be made on one stator. The number of poles represents how much a motor can achieve per minute. There is an inverse proportion between the number of poles and the rotation per minute of the motor. Suppose we reduce the number of poles in a motor, then we can achieve more rotation in the motor. If we increase the number of poles, the motor RPM will reduce.

Based on the following formula, the number of rotations per minute that can be reduced or increased by changing poles can be determined.

Ns = Number of RPM

F = Frequency

P = number of poles

Ns = 120f/p


This is another significant part of the stator. The core consists of a different number of stainless steel stamping. The size of each stamping can vary from 0.3 mm to 0.5 mm. These stainless steel stampings are stacked on one another. These stampings are bound with each other, and these are electrically insulated. The use of varnish coating creates this insulation. The primary purpose of these stamping is to hold the magnetic field generated by the coil. These cores also overcome magnetic losses, for example, eddy current losses.

The other significant aspect of the core is the total stack size. The enormous stack can hold a more unbalanced magnetic field. A more magnetic solid flux can be generated with the vast stack size. This will affect the overall motor performance and power consumption.

Frame or body

This stator part is made to hold the motor’s overall thing, including the stator. This will protect the inner windings core and rotor of the motor. On the core, different kinds of labeling are made. The connection made from the winding is also connected with the supply through the points made on the frame.

Working of a stator

The leading working of the stator is to generate the required magnetic field to help the rotator in its rotation. In the case of the motor, the stator gets the power from the electrical power source and converts this electrical power into magnetic power. This magnetic power is called the magnetic field, the driving force for the motor. In the case of the generator, the working of the stator is to receive power from the generator function and deliver it to the outer electrical system.

Frequently Asked Questions (FAQs)

  • How can you differentiate between the stator and rotor?

It can be apparent in a way if you see the self-explanatory words. The stator is the static part of the motor of the generator. The rotor means the rotating part of the motor or generator.

  • What is the primary purpose of stator?

The principal purpose of the stator is to generate a strong magnetic field that is used for the primary function of the motor. This magnetic field or force is generated in the air gaps of the motor.

  • Does the stator act in the same manner as the alternator?

In the engine case, stator components are located. In automotive applications, an alternator is a fully self-contained, externally mounted device that produces direct current. In addition, stators and automotive-style alternators use different types of magnets. Electromagnets are used in automotive alternators, while permanent magnets are used in stator motors.